- ICH GCP
- Registro de ensaios clínicos dos EUA
- Ensaio Clínico NCT03717896
Tiamina como terapia adjuvante para cetoacidose diabética
Visão geral do estudo
Status
Condições
Intervenção / Tratamento
Descrição detalhada
A tiamina (vitamina B1) é uma vitamina hidrossolúvel que desempenha um papel fundamental no metabolismo aeróbico da glicose. A tiamina é um cofator da piruvato desidrogenase (PDH), uma enzima que deve ser ativada para entrar no ciclo de Krebs para o metabolismo aeróbico. A atividade de PDH é reduzida em estados de deficiência de tiamina, resultando em uma mudança no metabolismo do piruvato para a via anaeróbica. Isso leva ao aumento da produção de lactato e acidose. A perda de tiamina na urina, com consequente deficiência de tiamina, não é incomum no diabetes. Os estudos preliminares dos investigadores descobriram que a deficiência de tiamina ocorre em até 39% dos pacientes com CAD e que os níveis de tiamina estão inversamente associados ao lactato e à acidose. O investigador levanta a hipótese de que o tratamento de pacientes com CAD com tiamina intravenosa levará a uma resolução mais rápida da acidose e melhora do metabolismo aeróbico. A hipótese secundária do investigador é que o tratamento com tiamina reduzirá as estadias na UTI e no hospital e levará à utilização de menos recursos hospitalares.
Neste estudo randomizado, duplo-cego, controlado por placebo, os pacientes internados no hospital com CAD inscritos no estudo serão randomizados para tiamina intravenosa (200 mg em solução salina a 0,9%) duas vezes ao dia por dois dias ou um volume idêntico de solução salina 0,9% no mesmo horário. O resultado primário do investigador é a alteração no bicarbonato nas 24 horas após a inscrição, com medições em 0, 6, 12, 18, 24 horas, usando um modelo linear de efeitos mistos. Secundariamente, os pacientes serão estratificados por DM Tipo I e Tipo II. Além disso, uma sub-análise pré-planejada de indivíduos com deficiência de tiamina será realizada.
Tipo de estudo
Inscrição (Real)
Estágio
- Fase 2
Contactos e Locais
Locais de estudo
-
-
Massachusetts
-
Boston, Massachusetts, Estados Unidos, 02215
- Beth Israel Deaconess Medical Center
-
-
Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
Aceita Voluntários Saudáveis
Descrição
Critério de inclusão:
- Bicarbonato ≤15 mEq/L
- Intervalo aniônico > 12 mEq/L
- pH do sangue≤ 7,24 (se já obtido pela equipe clínica)
- Cetonas na urina (qualitativa) ou cetonas séricas (ácido β-hidroxibutírico) > 3 mmol/L
- Inscrição até 6 horas após a apresentação
Critério de exclusão:
- Suplementação atual de tiamina ≥ 6 miligramas por dia (ou seja, mais do que um multivitamínico)
- Causas concorrentes de acidose grave, incluindo convulsão, envenenamento por monóxido de carbono, toxicidade por cianeto, parada cardíaca, disfunção hepática (especificamente definida como cirrose conhecida)
- Alergia conhecida à tiamina
- Indicação concorrente para administração de tiamina conforme julgado pela equipe clínica (por exemplo, alcoólatra)
- Populações protegidas para pesquisa (mulheres grávidas, prisioneiros, deficientes intelectuais)
- Paciente inscrito anteriormente no mesmo estudo
- Status do código de Não Ressuscitar/Não Intubar (DNR/DNI) ou Apenas Medidas de Conforto (CMO)
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
- Finalidade Principal: Tratamento
- Alocação: Randomizado
- Modelo Intervencional: Atribuição Paralela
- Mascaramento: Quadruplicar
Armas e Intervenções
Grupo de Participantes / Braço |
Intervenção / Tratamento |
|---|---|
|
Experimental: Tiamina
200 mg de tiamina IV em 50 mL de solução salina 0,9% duas vezes ao dia por 2 dias
|
Tiamina 200mg IV a cada 12 horas por 2 dias
Outros nomes:
|
|
Comparador de Placebo: Placebo
100mL de soro fisiológico 0,9% duas vezes ao dia por dois dias
|
50mL de soro fisiológico 0,9%
|
O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
|
Plasma Bicarbonate Levels
Prazo: 6, 12, 18, and 24 hours after enrollment
|
Primary outcome of plasma bicarbonate levels over 24 hours (6, 12, 18, 24 hours) following enrollment
|
6, 12, 18, and 24 hours after enrollment
|
Medidas de resultados secundários
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
|
Lactate
Prazo: 6, 12, 18, and 24 hours after enrollment
|
Secondary outcome of lactate over 24 hours (6, 12, 18, 24 hours) following enrollment
|
6, 12, 18, and 24 hours after enrollment
|
|
Anion Gap
Prazo: 6, 12, 18, and 24 hours after enrollment
|
Secondary outcome of anion gap over 24 hours (6, 12, 18, 24 hours) following enrollment
|
6, 12, 18, and 24 hours after enrollment
|
|
ICU Length of Stay
Prazo: 45 days
|
ICU length of stay reflects the number of ICU admission days.
|
45 days
|
|
Hospital Length of Stay
Prazo: 45 days
|
Hospital length of stay reflects how long it takes a diabetic ketoacidosis patient to recover to the point where he/she can be released from the hospital.
|
45 days
|
|
Duration of Insulin Therapy
Prazo: First 7 days after enrollment
|
The duration of insulin therapy is calculated by examining the hospital clinical information systems for all records of IV insulin infusion beginning at the time of enrollment.
The start and the stop time-stamps of medication infusion are used to calculate a duration of infusion.
|
First 7 days after enrollment
|
|
SOFA Score (Sequential Organ Failure Assessement Score)
Prazo: 24 hours
|
The SOFA score is a validated measure of organ dysfunction commonly used in critically ill patients, particularly those with sepsis.
It evaluates the function of six organ systems-respiratory, cardiovascular, neurologic, hepatic, renal, and coagulation-based on routinely collected clinical and laboratory data.
Each organ system is assigned a score from 0 (normal function) to 4 (most severe dysfunction), resulting in a total score ranging from 0 to 24.
Higher SOFA scores indicate greater severity of organ failure and a higher risk of adverse outcomes.
SOFA score in this study uses a modification in which the arterial oxygen saturation/fraction of inspired oxygen (SaO2 /FiO2) ratio is substituted for the partial pressure of arterial oxygen/fraction of inspired oxygen (PaO2 /FiO2 ratio).
|
24 hours
|
|
Oxygen Consumption by Circulating Mononuclear Cells
Prazo: 24 hours
|
Oxygen consumption rate of circulating peripheral blood mononuclear cells measured using Seahorse.
Basal respiration represents oxygen consumption under baseline conditions.
ATP-linked respiration represents oxygen consumption coupled to ATP production, while proton leak represents oxygen consumption not linked to ATP synthesis.
Maximal respiration represents the maximal capacity of the electron transport chain after uncoupling.
Spare respiratory capacity represents the difference between maximal and basal respiration and indicates the ability to respond to increased energy demand.
Non-mitochondrial respiration represents oxygen consumption independent of mitochondrial activity.
|
24 hours
|
|
Pyruvate Dehydrogenase Activity
Prazo: 24 hours and 72 hours (or at discharge if hostpial length of stay was less than 72 hours)
|
Secondary outcome of change in PDH specific activity over 72 hours or at discharge if patient's hospital length of stay was less than 72 hours.
PDH activity and total PDH protein quantity were measured in isolated peripheral blood mononuclear cells (PBMCs) following selective disruption of the mitochondrial membrane, using a previously validated immunocapture and microplate-based enzymatic assay protocol.
PDH-specific activity was calculated as the ratio of measured PDH enzymatic activity to the natural logarithm of PDH protein quantity (PDH activity / ln[PDH quantity]), providing a normalized metric that reflects the functional efficiency of the enzyme independent of its expression level.
Higher values suggest higher enzymatic efficiency.
|
24 hours and 72 hours (or at discharge if hostpial length of stay was less than 72 hours)
|
|
Neurocognitive: Hopkins Verbal Learning Test - Total Recall
Prazo: At hospital discharge, median of 4 days
|
The Hopkins Verbal Learning Test-Revised (HVLT-R) Total Recall score is a measure of verbal learning and immediate memory.
Participants are read a list of 12 words (from three semantic categories) and asked to recall as many words as possible across three consecutive learning trials.
The Total Recall score is calculated as the sum of correctly recalled words across the three trials, yielding a possible range of 0 to 36, with higher scores indicating better verbal learning and memory performance.
This score reflects both initial acquisition and short-term retention of verbal information and is commonly used to assess cognitive function in clinical research.
|
At hospital discharge, median of 4 days
|
|
Neurocognitive: Hopkins Verbal Learning Test - Delayed Recall
Prazo: At hospital discharge, median of 4 days
|
The Hopkins Verbal Learning Test-Revised (HVLT-R) Delayed Recall score assesses retention of verbal information after a delay.
Following completion of the three learning trials, participants are asked to recall the previously presented word list after a delay period (typically 20-25 minutes) without re-exposure to the words.
The Delayed Recall score is calculated as the number of correctly recalled words, with a possible range of 0 to 12, where higher scores indicate better memory retention.
This measure reflects the ability to consolidate and retrieve learned information over time and is commonly used to evaluate memory function in clinical and research settings.
|
At hospital discharge, median of 4 days
|
|
Neurocognitive: Hopkins Verbal Learning Test - Retention
Prazo: At hospital discharge, median of 4 days
|
The Hopkins Verbal Learning Test-Revised (HVLT-R) Retention (%) score reflects the proportion of learned information that is retained over a delay.
It is calculated as the ratio of the Delayed Recall score to the highest number of words recalled on any of the three immediate recall trials, multiplied by 100, yielding a percentage value.
Scores typically range from 0% to 100%, with higher values indicating better retention of previously learned material.
This measure provides an index of memory retention independent of initial learning performance.
|
At hospital discharge, median of 4 days
|
|
Neurocognitive: Hopkins Verbal Learning Test - Recognition Discrimination Index
Prazo: At hospital discharge, median of 4 days
|
The Hopkins Verbal Learning Test-Revised (HVLT-R) Recognition Discrimination Index assesses recognition memory by evaluating the ability to distinguish previously learned words from novel distractors.
During the recognition phase, participants are presented with a list of target words and distractor words and asked to identify those that were previously learned.
The Recognition Discrimination Index is calculated as the number of true positives (correctly identified target words) minus the number of false positives (incorrectly identified distractor words), yielding a score typically ranging from -12 to 12. Higher scores indicate better recognition accuracy and discrimination ability, reflecting the integrity of memory retrieval processes.
|
At hospital discharge, median of 4 days
|
|
Neurocognitive: Brief Visuospatial Memory Test
Prazo: At hospital discharge, median of 4 days
|
The Brief Visuospatial Memory Test (BVMT) assesses visuospatial learning and memory.
Participants are shown six geometric designs for a brief period and asked to reproduce them from memory across three learning trials.
Performance is scored based on the accuracy and placement of each design, with a total recall score ranging from 0 to 36, where higher scores indicate better visuospatial memory.
A delayed recall trial is administered after a delay to assess retention of visual information.
This measure evaluates the ability to encode, store, and retrieve visuospatial material.
|
At hospital discharge, median of 4 days
|
|
Neurocognitive: Trail Making Test - Test Part A
Prazo: At hospital discharge, median of 4 days
|
The Trail Making Test Part A (TMT-A) assesses visual attention, processing speed, and psychomotor function.
Participants are instructed to connect numbered circles in sequential order as quickly as possible.
The primary outcome is the time to completion, measured in seconds, with lower times indicating better performance.
There is no fixed maximum score, although testing is typically discontinued at a predefined time limit (commonly 300 seconds).
|
At hospital discharge, median of 4 days
|
|
Neurocognitive: Trail Making Test - Test Part B
Prazo: At hospital discharge, median of 4 days
|
The Trail Making Test Part B (TMT-B) assesses executive function, including cognitive flexibility and set-shifting, in addition to processing speed.
Participants are required to alternate between numbers and letters in sequence (e.g., 1-A-2-B) as quickly as possible.
The primary outcome is the time to completion, measured in seconds, with lower times indicating better performance.
As with TMT-A, there is no fixed maximum score, and testing is typically discontinued at a predefined time limit (commonly 300 seconds).
|
At hospital discharge, median of 4 days
|
|
Neurocognitive: WAIS-IV Digit Span
Prazo: At hospital discharge, median of 4 days
|
The Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV) Digit Span subtest assesses attention, working memory, and concentration.
Participants are asked to repeat sequences of numbers in forward order (Digit Span Forward), reverse order (Digit Span Backward), and ascending order (Digit Span Sequencing).
Scores are based on the total number of correctly recalled sequences, with higher scores indicating better attention and working memory capacity.
The total score ranges from 0 to 48.
|
At hospital discharge, median of 4 days
|
|
Neurocognitive: Test of Verbal Fluency and Animal Naming
Prazo: At hospital discharge, median of 4 days
|
The Animal Naming test is a measure of semantic verbal fluency and executive function.
Participants are asked to name as many animals as possible within a fixed time period.
The score is the total number of unique, correct animal names generated, with higher scores indicating better semantic memory retrieval and executive functioning.
Scores range from 0 with no fixed upper limit.
|
At hospital discharge, median of 4 days
|
|
Neurocognitive: Test of Premorbid Functioning
Prazo: At hospital discharge, median of 4 days
|
The Test of Premorbid Functioning (TOPF) estimates an individual's baseline cognitive ability prior to illness or injury.
Participants are asked to read aloud a list of irregularly spelled words, and performance is scored based on correct pronunciation.
Scores are used to estimate premorbid intellectual functioning.
Scores range from 0 to 70, with higher scores indicating higher estimated premorbid functioning.
This measure helps contextualize current cognitive performance relative to expected baseline levels.
|
At hospital discharge, median of 4 days
|
Outras medidas de resultado
Medida de resultado |
Descrição da medida |
Prazo |
|---|---|---|
|
C-peptide Levels
Prazo: 0, 24 hours, and 72 hours (or at discharge if hospital length of stay was less than 72 hours)
|
C-peptide levels measured at time of study drug administration, 24 hours, and at 72 hours (or at discharge if hospital length of stay was less than 72 hours).
|
0, 24 hours, and 72 hours (or at discharge if hospital length of stay was less than 72 hours)
|
Colaboradores e Investigadores
Patrocinador
Investigadores
- Investigador principal: Michael Donnino, MD, Beth Israel Deaconess Medical Center
Publicações e links úteis
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo (Real)
Conclusão Primária (Real)
Conclusão do estudo (Real)
Datas de inscrição no estudo
Enviado pela primeira vez
Enviado pela primeira vez que atendeu aos critérios de CQ
Primeira postagem (Real)
Atualizações de registro de estudo
Última Atualização Postada (Real)
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última verificação
Mais Informações
Termos relacionados a este estudo
Palavras-chave
Termos MeSH relevantes adicionais
- Doenças do Sistema Endócrino
- Doenças Metabólicas
- Diabetes Mellitus
- Complicações do Diabetes
- Desequilíbrio ácido-base
- Doenças Nutricionais e Metabólicas
- Cetose
- Acidose
- Cetoacidose diabética
- Compostos de enxofre
- Produtos químicos orgânicos
- Compostos heterocíclicos, 1 anel
- Compostos heterocíclicos
- Tiazóis
- Azoles
- Produtos químicos inorgânicos
- Compostos de cloro
- Pirimidinas
- Compostos de sódio
- Cloretos
- Ácido clorídrico
- Tiamina
- Cloreto de sódio
Outros números de identificação do estudo
- 2018P000475
- 1R01DK112886-01A1 (Concessão/Contrato do NIH dos EUA)
Plano para dados de participantes individuais (IPD)
Planeja compartilhar dados de participantes individuais (IPD)?
Informações sobre medicamentos e dispositivos, documentos de estudo
Estuda um medicamento regulamentado pela FDA dos EUA
Estuda um produto de dispositivo regulamentado pela FDA dos EUA
produto fabricado e exportado dos EUA
Essas informações foram obtidas diretamente do site clinicaltrials.gov sem nenhuma alteração. Se você tiver alguma solicitação para alterar, remover ou atualizar os detalhes do seu estudo, entre em contato com register@clinicaltrials.gov. Assim que uma alteração for implementada em clinicaltrials.gov, ela também será atualizada automaticamente em nosso site .